1977–78 League Cup (rugby league)

This was the seventh season for the competition, from this season the League Cup was known as the John Player Trophy for sponsorship reasons. Warrington won the trophy, beating Widnes in the final by the score of 9-4. The match was played at Knowsley Road, St Helens, Merseyside. The attendance was 10,258 and receipts were £8429.

1977–78 League Cup (rugby league)

This was the seventh season for the competition, from this season the League Cup was known as the John Player Trophy for sponsorship reasons. Warrington won the trophy, beating Widnes in the final by the score of 9-4. The match was played at Knowsley Road, St Helens, Merseyside. The attendance was 10,258 and receipts were £8429.